mscShelfCardMsgBlockUsageAvg 1.3.6.1.4.1.562.36.2.1.13.2.14.1.7

This attribute indicates the processor's average memory utilization of shared message blocks, calculated over a specified time period, timeInterval. This utilization value is calculated using 15 second samples. At the start of each timeInterval, this average memory utilization is reset to the current usage, sharedMsgBlockUsage. If there is no shared memory on the card, this attribute indicates 0.